/**
 * Base dir for the daemon socket/pid/log and stored sessions. Defaults to `~/.browserplex`;
 * override with `BROWSERPLEX_DIR` (used to relocate the runtime dir and to isolate tests).
 */
export declare const BASE_DIR: string;
export declare const SOCKET_PATH: string;
export declare const PID_PATH: string;
export declare const LOG_PATH: string;
/** Restrictive perms — the daemon exposes full browser control. */
export declare const SOCKET_MODE = 384;
/** Max bytes for a single newline-delimited message (OOM guard). */
export declare const MAX_LINE_BYTES: number;
export interface DaemonRequest {
    id: number;
    tool: string;
    args?: Record<string, unknown>;
}
export interface DaemonResponse {
    /** Echoes the request id; null only when the request id could not be parsed. */
    id: number | null;
    ok: boolean;
    text?: string;
    data?: unknown;
    imageBase64?: string;
    mimeType?: string;
    error?: string;
}
/** Serialize a message as a single newline-terminated JSON line. */
export declare function encodeMessage(msg: DaemonRequest | DaemonResponse): string;
/**
 * Buffers socket chunks and yields complete non-empty lines split on "\n".
 * Yields raw strings (not parsed) so the caller can isolate parse/shape errors
 * per message and turn them into error replies instead of crashing.
 * - Tolerates messages split across chunks and multiple messages per chunk.
 * - Skips empty lines.
 * - Throws on a single line exceeding MAX_LINE_BYTES (caller closes the socket).
 */
export declare class LineDecoder {
    private buffer;
    private sd;
    /** Push a chunk; returns the complete lines it finished. */
    push(chunk: Buffer | string): string[];
}
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